[ loo-tee-in ]
/ ˈlu ti ɪn /

noun Biochemistry.

Also called xanthophyll. a yellow-red, water-insoluble, crystalline, carotenoid alcohol, C40H56O2, found in the petals of marigold and certain other flowers, egg yolk, algae, and corpora lutea: used chiefly in the biochemical study of the carotenoids.
a preparation consisting of dried and powdered corpora lutea from hogs.

Origin of lutein

1865–70; < Latin lūte(um) yolk of an egg (noun use of neuter of lūteus yellow; see luteous) + -in2 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for lutein

/ (ˈluːtɪɪn) /


a xanthophyll pigment, occurring in plants, that has a light-absorbing function in photosynthesis

Word Origin for lutein

C20: from Latin lūteus yellow + -in
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for lutein

[ lōōtē-ĭn, -tēn′ ]


A yellow carotenoid pigment found widely in nature; xanthophyll.
A dried preparation of corpus luteum.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.